Electrical panel-board.



PATENTED APR. 25, 1905 H. KRANTZ. ELECTRICAL PANEL BOARD.

APPLICATION FILED 13130.6, 1904.

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H. KRANTZ.

ELEOTRIGAL PANEL BOARD.

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APPLICATION FILED D1206, 1904.

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Patented April 25, 1905.

PATENT OEEIcE.

HUBERT KRANTZ, OF' NEIV YORK, N. Y.

ELECTRICAL PANEL-BOARD.

SPECIFICATION forming part of Letters Patent No. 788,109, dated April25, 1905.

Application filed December 6, 1904:. Serial No. 235,736. I

To all whom, it may concern.-

Be it known that I, HUBERT KRANTZ, a citizen of the United States, and aresident of New York city, borough of Brooklyn, Kings county, State ofNew York, have invented Improvements in Electrical Panel-Boards, ofwhich the following is a specification.

This invention relates to electrical panelboards, switchboards, or thelike, and has for its object to reduce the size thereof, andconsequently the cost, while keeping within the laws as to safedistances between parts of opposite polarity, and also to reduce thenumber of joints, and consequently increase the conductivity.

My present invention relates more particularly to panel-boards in whichit is necessary to have the safety-fuses connected directly to thecross-bars.

In the drawings I have shown, by way of example, a plain fusepanel-board; but I do not limit my invention to any specific form orconstruction of device.

Figure 1 is a face View of one form of fuse panel-board, illustrating myinvention. Fig. 2 is a sectional view taken on line 2 2 of Fig. 1. Fig.3 is a sectional view taken on line 3 3 of Fig. 1. Fig. 4; is asectional view of a portion of the panel-board, showing a slightmodification. Fig. 5 illustrates a blank from which one of thecross-bars is formed. I Fig. 6 is a view similar to Fig. 1, butillustrating a threewire panel-board. Fig. 7 is a sectional view takenon line 7 7 of Fig. 6. Fig. 8 is a sectional view taken on line 8 8 ofFig. 6. Fig. 9 illustrates a blank; and Fig. 10, a perspective view ofsaid blank bent to shape for use, representing a modification ofcross-bar shown in Figs. 6, 7, and 8. Fig. 11 is a sectional View of aportion of a panel-board, showing the application of the last-namedmodification.

Hcretofore in order to comply with the laws for connecting thesafety-fuses to the cross-bars at a safe distance from the busbars thecross-bars have been extended beyond the bus-bars at each side. Also thefuses heretofore have been in proximity to the base, and consequently itoften occurs that when a fuse burns out the base just under it iscracked or broken out by the heated fuse or the ignited deposit from thefuse. By this present invention I support the cross-bars a safe distanceaway from the plane in which the busbars lie and end these cross-barsapproximately flush with the bus-bars. Also I mount the fuseconnection-pieces in substantially the same plane with the cross-bars,so that the connections between the fuses and the crossbars arepractically above the bus-bars. By this arrangement I not only saveconsiderable space each side of the bus-bars and save material of thecross-bars, but the fuses are carried away from the base.

Referring to Figs. 1, 2, and 3, A represents the base; B B, thebus-bars; U G O O, the cross-bars; D, the fuses, and E the fuseconnection-pieces. The cross-bars C C are each formed from a singleblank, preferably that represented by Fig. 5. This blank 1 is cut onlines 2 3 4 5 and bent on lines 6 7 8 9 into the form shown by Figs. 1to lthat is, the cross-bar G presents a flat surface in the form of anI, Fig. 1-that is, having side extensions at the ends, providing forfour fuse connecting-points c c c c, Fig. 1-and the bent portions of theblank form two anglepieces, each comprising an upright 13", Figs. 2 and3, and a base 0, adapted to be connected to a bus-bar, as shown. Theseangle-pieces c c 'make electrical connection between the cross-bar and abus-bar and at the same time support the cross-bar in the desiredposition away from the bus-bars. This arrangement is very ad vantageousin giving a large contactsurface between the angle-surmorts and thebus-bar and in giving four branch fuse connections for virtually onejoint, the angle-supports being in one piece with each other. The endcross-bars C C may be formed by straight strips, as shown, bent down atone end into an angle-piece for connection with a bus-bar, or these endcross-bars may be made in the form of the cross-bars C and cut in twolengthwise. If desired, insulating-blocks F may be used to steady theends of the cross-bars not connected to the bus-bars, or instead of theblocks F a block of slate S, Fig. 4, may be placed between the bus-bars,running lengthwise therewith. upon which slate block one or more of thecross-bars may rest.

Fig. 6 represents a three main fuse panel in which two of the bus-bars BB rest upon the base A and the central bus-bar B rests upon a block ofslate S. Cross-bars C C G are electrically connected to the centralbusbar B the cross-bar C presenting four fuse branch connections. Twofuse branch connecting-pieces C 1", formed from straight strips bentinto angle-pieces, are electrically connected to the bus-bar B", asshown in Figs. 6 and 7, and two similar pieces C G are electricall yconnected to the bus-bar B The fuse connection-pieces E are raised tosubstantially the plane of the cross-bars, as in Figs. 1 to 3. If thethree bus-bars are placed directly upon the base, as shown at B B 13Fig. 11, the central cross bar or bars 0" may be formed from a blanksuch as shown in Fig. 9.. This blank is cut on lines 11 12 13 14c andbent on lines 15 16 17 18 to provide angle-pieces at the center of thebar, Fig. 10, these angle-pieces having uprights and bases 0, adapted tobe secured to the central bus-bar B, Fig. 11.

I do not limit myself to the specific construction of cross-bar or offuse connectionpiece described, as any other arrangement that wouldpresent portions of the cross-bars for fuse connecting-pointsapproximately at or within the limits of the space occupied by thebus-bars crosswise of the board, but at a safe distance from thebus-bars, would come within the scope of my invention.

1 claim as my invention- 1. In a panel-board, the combination ofbusbars, with cross-bars supported in a plane at a distance away fromthe plane in which the bus-bars are placed. and fuses connected to thecross-bars at points approximately in line with the bus-bars crosswiseof the board.

2. In apanel-board, the combination of busbars, with cross-bars endingapproximately flush with the bus-bars, crosswise of the board, fuseconnection-pieces, said cross-bars and said pieces being in a planeparallel with, but at a distance from, the plane in which the busbarslie.

3. In a panel-board, the combination of busbars, with cross-bars havingfuse connectionpoints in a plane parallel with, and at a distance from,the plane of the bus-bars, but substantially within the limits of thespace occupied by the bus-bars crosswise of the board.

4. In a panel-board, the combination of busbars, with a cross-bar endingapproximately flush with the bus-bars, crosswise of the board, andhaving side extensions at its ends to provide four fuseconnecting-points, said extensions being supported at a distance awayfrom the bus-bars.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

IIUBERT KRANITZ.

Vitnesses:

E. HOMAN, S. S. WVHITLooK.

